*{
    padding:0;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}
html, body {
    width: 100%;
    #header {
        padding: 10px 10%;
        a {
            text-decoration: none;
            color: black;
        }
    }
    overflow-x: hidden;
}
.btn {
    display: none;
    float:right;
    margin-top: 25px;
    border: 0;
    border-radius: 5px;
    width: 40px;
    height: 40px;
}
#header .logo {
    img{
        width: 180px;
    }
}
#header div.nav {
    margin: 0 auto;
    width: 80%;
    height: 50px;
}
#header ul.nav-bar {
    list-style: none;
    float: right;
    line-height: 40px;
    margin-top: 30px;
    text-align: center;
    li{
        margin-left: 5px;
        width: 80px;
        :hover{
            border-bottom: 0;
        }
    }
    :hover{
        border-bottom: 1px solid #208cb0;
        cursor: pointer;
    }
}
#header ul.nav-bar li {
    float:left;
    padding: 0 10px;
}
.banner {
    margin-top: 40px;
    width: 100%;
    height: 300px;
    background-image: url('../images/about.jpg');
    background-size: 100% 300px;
    overflow: hidden;
    .container{
        width: 200px;
        height: 100px;
        margin-top: 5%;
        margin-left: 18%;
        color: white;
        text-align: center;
        line-height: 3em;
        p{
            font-size: 2em;
        }
        span{
            font-size: 1.5em;
        }
    }
    img{
        width: 100%;
        height: 300px;
    }
}
.content{
    display: -webkit-flex;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 65%;
    margin: 2% auto;
    .content-nav{
        width: 25%;
        .list_dl{
            background-color: #fafafa;
            width: 100%;
            border-bottom: 3px solid #208cb0;
            .list_title{
                width: 100%;
                background-color: #208cb0;
                text-align: center;
                line-height: 3em;
                color: white;
                font-size: 1.7em;
                span{
                    font-weight: bold;
                }
            }
            .list_dt{
                color: #333;
                width: 100%;
                height: 2em;
                line-height: 2em;
                cursor: pointer;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
                position: relative;
                border-bottom: 1px solid #e9e9e9;
                font-size: 1.2em;
                margin-bottom: 1px;
                p{
                    padding-left: 20px;
                }
            }
            .list_c{
                padding:30px 10px;
            }
            .active{
                background-color: #208cb0;
                border: 0;
                color: white;
            }
            .list_dt:hover{
                background: #107293;
                color: white;
            }
            .list_dt:hover ._after{
                display: block;
                width: 3px;
                height: 100%;
                position: absolute;
                left: 0;
                top: 0;
                background: #4285F4;
            }
        }
    }
    .content-article{
        width: 72%;
        .article-title{
            font-size: 1.5em;
            line-height: 2em;
            span{
                font-weight: bold;
                padding-bottom: .3em;
                border-bottom: 2px solid #208cb0;
            }
        }
        .content{
            width: 100%;
            display: flex;
            flex-direction: row;
            img{
                width: 30%;
                height: 50%;
            }
            span{
                width: 68%;
            }
        }
    }
}
.footer{
    width: 100%;
    background-color: #f2f2f2;
    color: #595757;
    display: flex;
    font-size: .9em;
    justify-content: center;
    .footer-logo{
        margin-top: 10px;
        margin-right: 2%;
        img{
            width: 250px;
        }
    }
    .footer-content{
        display: flex;
        flex-direction: column;
        .footer-copyright{
            margin-top: 30px;
        }
        div{
            margin-top: 10px;
        }
        margin-right: 2%;
    }
    .footer-qr{
        margin-top: 10px;
        display: flex;
        justify-content: center;
        height: 140px;
        margin-right: 2%;
        .qr{
            display: flex;
            flex-direction: column;
            img{
                margin: 0 auto;
                width: 100px;
            }
            p{
                margin-top: 10px;
                margin-bottom: 10px;
            }
        }
    }
}
@media screen and (max-width: 1600px){
    #header{
        margin-bottom: -2%;
    }
    #header div.nav{
        width: 90%;
    }
    html, body{
        #header {
            padding: 10px 2%;
            height: 80px;
            overflow: hidden;
            .nav{
                margin-top: -8.5px;
                .nav-bar {
                    margin-top: 15px;
                    border-top: solid 1px #111;
                    width:100%;
                    line-height: 70px;
                    :hover{
                        border: 0;
                    }
                    li {
                        float: none;
                        padding: 0 10px;
                    }
                }
            }
        }
    }
    .btn {
        display: block;
    }
    .banner{
        .container{
            width: 200px;
            height: 100px;
            margin-top: 7%;
            margin-left: 8%;
            color: white;
            text-align: center;
            line-height: 3em;
            p{
                font-size: 2em;
            }
            span{
                font-size: 1.5em;
            }
        }
    }
    .content{
        .content-article{
            span{
                font-size: .9em;
            }
        }
    }
}
@media screen and (max-width:1440px){
    .content{
        display: flex;
        flex-direction: column;
        .content-nav{
            margin: 0 auto;
            width: 300px;
        }
        .content-article{
            margin: 0 auto;
            width: 90%;
        }
    }
}
@media screen and (max-width:1080px){
    #header{
        margin-bottom: -5%;
    }
    .banner{
        background-size: 100% 250px;
        height: 250px;
        .container{
            width: 200px;
            height: 100px;
            margin-top: 7%;
            margin-left: 7%;
            color: white;
            text-align: center;
            line-height: 2.5em;
            p{
                font-size: 1.8em;
            }
            span{
                font-size: 1.3em;
            }
        }
    }
    .content{
        .content-article{
            .article-title{
                display: flex;
                justify-content: center;
                margin-top: 20px;
            }
            .content{
                display: flex;
                flex-direction: column;
                img{
                    margin: 10px auto;
                    width: 300px;
                }
                span{
                    margin: 10px auto;
                }
            }
        }
    }
    .footer{
        display: flex;
        flex-direction: column;
        .footer-logo{
            display: flex;
            justify-content: center;
            img{
                width: 200px;
                height: 140px;
            }
        }
        .footer-content{
            div{
                display: flex;
                justify-content: center;
            }
        }
    }
}
@media screen and (max-width: 768px){
    #header{
        display: flex;
        justify-content: space-between;
        margin-bottom: 0;
        .nav{
            width: 100%;
        }
    }
    .banner{
        margin-top: 0px;
        background-size: 100% 130px;
        height: 130px;
        .container{
            width: 200px;
            height: 80px;
            margin-top: 6%;
            margin-left: 5%;
            color: white;
            text-align: center;
            line-height: 2em;
            p{
                font-size: 1.5em;
            }
            span{
                font-size: 1.2em;
            }
        }
    }
    .content{
        width: 100%;
    }
    .footer{ 
        .footer-content{
            margin-top: -30px;
            .footer-copyright{
                display: flex;
                flex-direction: column;
                span{
                    display: flex;
                    justify-content: center;
                    margin-top: 0px;
                }
            }
            .footer-touch{
                display: flex;
                flex-direction: column;
                span{
                    display: flex;
                    justify-content: center;
                    margin-top: 0px;
                }
            }
            .footer-co{
                display: flex;
                flex-direction: column;
                span{
                    display: flex;
                    justify-content: center;
                    margin-top: 0px;
                }
            }
        }
    }
}